What Trump and JW are very effective is: Trump"ling" the brains of the followers
Trump had such a success because he always repeated the same things (lies included), created easy pictures and confirmed them by constantly by saying "believe me", "believe me".
What can we learn? One believed what he said but what was only show, what was only propaganda and what does he think really?
Through constant repeating of the same things our brain circuits get strenghened, because our brains like to get trained to believe what is repeated. By repeating a lie again and again one could easily give the lie the character of truth, this would function at least in certain moments. What was once heared would remain. Thats good for learning.
JW use the learning method in assemblies and on big conventions, they listen and hear again and again the same things.
Linguistics are training speakers and politicians to speak with influence, to create pictures. Political framing techniques. A whole nation begins to believe, to think what is actually only talked to the nation into believing it, so it becomes politics. The winner with the best language takes it all.
Human brain changes through language, the aural sense is of most importance for us, our brain is changing each day and it is hard to edit what was once heared by rational arguments.
Note: Dont let your malleable mind get trumpled by those who say "believe us". Cults use religious framing to isolate.